Note 12 - Property and Equipment, Net (Tables)

6 Months Ended

Jun. 30, 2021

Notes Tables

Property, Plant and Equipment [Table Text Block]

(in thousands)	June 30, 2021		December 31, 2020		June 30, 2020
Equipment and vehicles	$	991,812	$	950,416	$	959,083
Quarry property		195,284		206,073		196,033
Land and land improvements		127,417		135,639		135,707
Buildings and leasehold improvements		122,343		124,578		121,387
Office furniture and equipment		76,682		73,512		69,258
Property and equipment		1,513,538		1,490,218		1,481,468
Less: accumulated depreciation and depletion		996,395		963,202		941,415
Property and equipment, net	$	517,143	$	527,016	$	540,053